GRASS GIS 8 Programmer's Manual  8.5.0dev(2024)-c7e1de7dfd
cairodriver/erase.c
Go to the documentation of this file.
1 /*!
2  \file lib/cairodriver/erase.c
3 
4  \brief GRASS cairo display driver - erase screen
5 
6  (C) 2007-2008 by Lars Ahlzen and the GRASS Development Team
7 
8  This program is free software under the GNU General Public License
9  (>=v2). Read the file COPYING that comes with GRASS for details.
10 
11  \author Lars Ahlzen <lars ahlzen.com> (original contributor)
12  \author Glynn Clements
13  */
14 
15 #include "cairodriver.h"
16 
17 /*!
18  \brief Erase screen
19  */
20 void Cairo_Erase(void)
21 {
22  G_debug(1, "Cairo_Erase");
23 
24  cairo_save(cairo);
25  cairo_set_source_rgba(cairo, ca.bgcolor_r, ca.bgcolor_g, ca.bgcolor_b,
26  ca.bgcolor_a);
27  cairo_set_operator(cairo, CAIRO_OPERATOR_SOURCE);
28  cairo_paint(cairo);
29  cairo_restore(cairo);
30 
31  ca.modified = 1;
32 
33  return;
34 }
void Cairo_Erase(void)
Erase screen.
GRASS cairo display driver - header file.
struct cairo_state ca
cairo_t * cairo
int G_debug(int, const char *,...) __attribute__((format(printf
double bgcolor_r
Definition: cairodriver.h:70
double bgcolor_a
Definition: cairodriver.h:70
double bgcolor_g
Definition: cairodriver.h:70
double bgcolor_b
Definition: cairodriver.h:70